Cutting torch



Nov. 2U 1923,

P. BORSEY GUTTINGTRCH Filed Oct. 16. 1922 Patented Nov. 2G, 1323.

UNETED STATES hallal-935i 'BARMER DORSEY, OF WICHITA, KANSAS, ASSIGNOR T0 IMPERIAL BRASS MANUFAC- TUBING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

CUTTING TORCH.

Application filed Getober 16, 1922.

To all whom t may concern:

Be it known that I, FARMER DonsnY, a citizen of the United States, and a resident of Wichita, in the county of Sedgwick and State of Kansas, have invented certain new and useful Improvements in Cutting Torches, of which the following is a specification.'

My invention is concerned with cutting torches such as employ a burner provided with one or more apertures through which oxygen mixed with hydrogen or acetylene is furnished to produce a heating flame and another aperture through which oxygen under a high pressure is furnished to combine chemically with the iron and thus cut it by burning a channel through it, and is dcsigned to produce such a burner that will have a nozzle that is more durable than those heretofore employed and which can be readily repaired and put in good working condition when it becomes foul from extended use.

To these ends, it consists of a novel construction which will be fully described hereinafter and particularly pointed out in the claims.

To illustrate my invention, I annex hereto a sheet of drawings, .in which the same reference characters are employed to designate identical parts in all the figures, of which,-

Fig. 1 is a central longitudinal section through the working end (except the extreme tip) of a cutting torch embodying my invention;

Fig. 2 is a detail in section on the line 2 2 of Fig. 1;

Fig. 3 is a detached;

Fig. 4 is an enlarged detail in central longitudinal section;

Fig. 5 is a detail in section on the line 5--5 of Fig. 4; and

Fig. 6 is a front elevation of the end of the tip with a modified construction.

I have not shown the valve end of the torch, as it may be of any desired construction and is provided with suitable valve mechanism by which a supply of oxygen under high pressure may be furnished, as for instance through the annular passage perspective view of the tip formed between the outer tube 10 and the,

inner tube 11. This inner tube 11 is associated with a suitable valve mechanism Serial I-l'o. 594,777.

for furnishing the desired mixture of oxygen under a relatively low pressure and hydrogen or acetylene for producing the heating llame, and it is screwed directly into the threaded end of the passage 12 formed in the body of the elbow 13. The tube l0 is secured in the larger opening 14 formed in the saine end of the elbow by means of the packing nut 15 screwed into said opening and co-operating through the packing 16 with the flange ring 17 secured on the inner end of the tube. A substantially central passage 18 through the elbow 13 opens at one end into the open space between the end of the tube 10 and the bottom of the opening 14, while its enlarged other end 19 receives the reduced inner end 2O of the tip 21, best seen in the perspective view con- Stituting` Fig. 3. A comparatively lar e central passage 22 extends substantial y through they tip, but terminates in a reduced portion 23 at the operating end. This tip 21 is preferably cylindrical in its general outline and has its working end preferably narrowed by beveling oft' two opposed surfaces 24, and has another beveled surface 25 preferably taking in about half of its crosssection. The bottom 26, when it is not cut away, may be flat, as indicated in Fig. 6, or it may be provided with the centrally located transverse channel 27, as shown in Fig. 4 and in dotted lines in Fig. 6, for a purpose to be hereinafter described. The shoulder 28 on the tip fits against the shoulder 29 formed on the interior of the elbow, and the tip is held in place by the nut 30, which has the annular shoulder 31 on its interior co-operating with the annular flange 32 formed .on the tip 21, and it has the exteriorly threaded extension 33 which is screwed into the internally threaded endv of the elbow 13. One or more recesses 34 are formed radially in the tip 21, and a small passage 35 is drilled lengthwise of the tube from one of the recesses 34 to the beveled surface 25. An examination of Fig. 1 will show that the burning mixture passing through the tube 11 passes into the opening 12 and from there through the reduced passage 36 formed in the elbow 13 to the passage formed between the outer surface of the upper portion of the tip21 and the inner surface of the extension 33, and thence through the recess 34 and passage 35 rto the point where it is ignited and becomes a lll@ heating fiame to raise the iron to a heat where when theJ high pressure oxygen is applied through the passage 23, it will combine chemically with the/iron and burn out the desired channel. An examination of Fig. 1 will also show that the high pressure oxygen passes between the tubes 10 and 11 through the passages 18 and 22 to the reduced portion 23, whence it emerges in a powerful stream to operate in the customary manner.

In operation, it will be understood that the tip of the burner is applied to the plate where the cutting is to begin and the controlling valves operated so that the heating jet fromthe passage 35 will operate strongly on the metal beneath it until it is heated to the'desiredV degree, after which the compressed oXygen valve is opened and the cutting begins and is continued simply by drawing the tip 26 over the line of the cut.

By this construction, it will be obvious that the burner is very readily controlled, as it does not have to be held with its tip a definite distance away from the plate as do some of them, and that the oxygen for cutting is applied always at a uniform distance from the iron and in a manner that is extremely effective, and there is n0 danger of the cutting ever ceasing on account of an improper position of the oxygen j et relative to the work. In course of time, there is more or less fouling of the tip on account of the brass of which it is ordinarily composed being in contact with the heated iron, and when this occurs, the tip can be readily cleaned and placed in condition for continued operation simply by passing a file a few times across the bottom 2G and the beveled surface 25, and this can be done readily by an unskilled workman, as the location of the exits for the two gases is so controlled by the construction that it is difficult to dress up the tip so that it will not work properly.

With the all-flat bottom shown in Fig. 6,

when the tip or nozzle is drawn over the cut there is an unnecessary friction due to the fact that the flat bottom rides on top of the burr formed on either side of the channel just cut, as is well known to those skilled in the art. 'Io remedy this, I preferably form the channel 27 in the bottom into which the passage 23 opens, which channel is wide enough to embrace both'burrs, so that the bottom 26 slides freely over the relatively smooth surface of the metal being cut, instead of over the burrs.

Y IVhile I have shown and described my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is lcapable of some modifications, andrI do not desire to be limited inthe interpretation of the following' claims except as may be necessitated by the state of the prior art.

IVha-t I claim as new, and desire to secure by Letters Patent of the United States, is:

1. A nozzle for cutting torches having its working end flattened lsubstantially at right angles to its axis and a flattened side thereof diverging at an angle of less than forty-five degrees from the axis with the aperture for the cutting flame opening out of said flattened end and with the aperture at which the heating flame mixture burns opening in said flattened side, for the purpose described.

2. A nozzle for the purpose described, having its working end flattened at substantially right angles to its axis and the side thereof flattened at an obtuse angle to said flattened end, with an aperture for the cutting flame opening at said flattened end in a groove extending across it, and with the aperture for the heating flame opening in said flattened side, for the purpose described.

3. A nozzle for a cutting torch having its working end flattened substantially at right angles to its axis, with an aperture for the cutting flame opening at said end, and a channel in said flattened portion for the purpose described, in alignment with said aperture. Y

In witness whereof, I have hereunto set my hand this 13th day of October, 1922.

FARMER DORSEY.

In the presence of- JOHN HOWARD MGELROY. 

